import 'package:flutter/material.dart';

import 'MyScaffold.dart';

void main() {
  runApp(const MyScaffoldApp());
}

class MyApp2 extends StatelessWidget {
  final String _name = "tankkkk";
  const MyApp2({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(title: const Text('My Home Page')),
        body: Center(
          child: Builder(
            builder: (context) {
              return SingleChildScrollView(
                child: Column(
                  children: [
                    const Text('Hello, World!'),
                    Center(
                      child: Container(
                        alignment: Alignment.center,
                        transform: Matrix4.rotationZ(0.1),
                        margin: const EdgeInsets.all(10.0),
                        color: Colors.amber[600],
                        width: 100.0,
                        height: 50.0,
                        child: Text('Hello World',
                            style: Theme.of(context)
                                .textTheme.bodySmall!
                                .copyWith(color: Colors.white)),
                      ),
                    ),
                    Container(
                        width: 100,
                        decoration: BoxDecoration(
                          border: Border.all(),
                          color: Colors.cyan[100],
                        ),
                        child: Text(overflow: TextOverflow.ellipsis, 'Hello $_name, how are you?')),
                    Container(
                        margin: const EdgeInsets.all(10.0),
                        decoration: BoxDecoration(
                          border: Border.all(),
                          color: Colors.blue[200],
                        ),
                        child: Row(
                          children: [
                            const Text(
                              'First Child',
                              style: TextStyle(color: Colors.white),
                            ),
                            const Text(
                              'Second Child',
                              style: TextStyle(color: Colors.white),
                            ),
                            Expanded(child: Text("Flutter's hot reload helps you quickly and easily experiment, build UIs, add features, and fix bug faster. Experience sub-second reload times, without losing state, on emulators, simulators, and hardware for iOS and Android.")),
                          ],
                        )
                    ),
                    Container(
                        color: Colors.yellow[100],
                        padding: const EdgeInsets.all(10.0),
                        // 使用 Stack 作为 Container 的 child
                        child: const Text.rich(
                          TextSpan(
                            text: 'Hello', // default text style
                            children: <TextSpan>[
                              TextSpan(text: ' beautiful ', style: TextStyle(fontStyle: FontStyle.italic)),
                              TextSpan(text: 'world', style: TextStyle(fontWeight: FontWeight.bold)),
                            ],
                          ),
                        )
                    ),
                    const Image(
                      image: NetworkImage('https://flutter.github.io/assets-for-api-docs/assets/widgets/owl.jpg'),
                      width: 150,
                      height: 100,
                      fit: BoxFit.fill,
                    ),
                    Image.network(
                        // 'https://flutter.github.io/assets-for-api-docs/assets/widgets/owl-2.jpg'
                        'https://img.shetu66.com/2023/04/25/1682405980883837.png',
                      width: 100,
                      height: 100,
                    ),


                    const SizedBox(height: 20),
                    ElevatedButton(
                      clipBehavior: Clip.antiAlias,
                      onPressed: () {
                        print('Click!');
                      },
                      child: const Text('A button'),
                    ),
                  ],
                )
              );
            },
          ),
        ),
      ),
    );
  }
}

class CounterWidget extends StatefulWidget {
  const CounterWidget({super.key});
  @override
  State<CounterWidget> createState() => _CounterWidgetState();
}

class _CounterWidgetState extends State<CounterWidget> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Text('hhh $_counter');
  }
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return Padding(
      padding: const EdgeInsets.all(8.0),
      child: MaterialApp(
        title: 'Flutter Demo',
        theme: ThemeData(
          // This is the theme of your application.
          //
          // TRY THIS: Try running your application with "flutter run". You'll see
          // the application has a purple toolbar. Then, without quitting the app,
          // try changing the seedColor in the colorScheme below to Colors.green
          // and then invoke "hot reload" (save your changes or press the "hot
          // reload" button in a Flutter-supported IDE, or press "r" if you used
          // the command line to start the app).
          //
          // Notice that the counter didn't reset back to zero; the application
          // state is not lost during the reload. To reset the state, use hot
          // restart instead.
          //
          // This works for code too, not just values: Most code changes can be
          // tested with just a hot reload.
          colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
        ),
        home: const MyHomePage(title: 'Flutter Demo Home Page'),
      ),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({super.key, required this.title});

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      // This call to setState tells the Flutter framework that something has
      // changed in this State, which causes it to rerun the build method below
      // so that the display can reflect the updated values. If we changed
      // _counter without calling setState(), then the build method would not be
      // called again, and so nothing would appear to happen.
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    //
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // TRY THIS: Try changing the color here to a specific color (to
        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
        // change color while the other colors stay the same.
        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      ),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          //
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          //
          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
          // action in the IDE, or press "p" in the console), to see the
          // wireframe for each widget.
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            const Text('You have pushed the button this many times:'),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headlineMedium,
            ),
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: const Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}
